987540 has 48 divisors (see below), whose sum is σ = 2808960. Its totient is φ = 259200.

The previous prime is 987533. The next prime is 987541. The reversal of 987540 is 45789.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987540.

It is not an unprimeable number, because it can be changed into a prime (987541) by changing a digit.

987540 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6465 + ... + 6615.

It is an arithmetic number, because the mean of its divisors is an integer number (58520).

2⁹⁸⁷⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 987540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404480).

987540 is an abundant number, since it is smaller than the sum of its proper divisors (1821420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

987540 is a wasteful number, since it uses less digits than its factorization.

987540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 987540 is about 993.7504716980. The cubic root of 987540 is about 99.5829296078.

The spelling of 987540 in words is "nine hundred eighty-seven thousand, five hundred forty".